Download - Pneu-1
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Amalan Kejuruteraan Mekanikal IIAmalan Kejuruteraan Mekanikal II
BDA 1811BDA 1811
Prepared by:
Saliana binti Sanusi
Tel: 013-3878446
Department of Manufacturing & Industrial Engineering,
Faculty of Mechanical & Manufacturing Engineering
PNEUMATIC PNEUMATIC
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Assessment
Task 1 : 20%
Task 2 : 30%
Task 3 : 30%
Test/Assignment : 20%
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Learning Outcomes:
After finish this task, students are able to:
Write definition of AutomationList automation types & applicationIdentify driven energy for automationIdentify & draw pneumatic equipments’
symbol according to ISO 1219 standards
Draw a correct pneumatic control circuit
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AUTOMATION
Definition
It is a technology concerned with the application of mechanical, electronic and computer-based
systems to operate and control production
(Automation, production systems and computer integrated Manufacturing, Mikell P. Groover)
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Some engineering disciplines relate to Automation TechnologyInstrumentation & Engineering ControlFluid mechanicsFluid PowerEngineering MathematicsEngineering MaterialBasic Electronics and ElectricityBasic Computer Science – Logic &
Programming
You have to master those subjects if you want to be an AUTOMATION expertise
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Automatic machine tools
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Automatic assembly machine
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Industrial robot
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Automatic material handling and retrieval system
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Automatic inspection systems for quality control
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Feedback & computer process control
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The reasons why we choose automationIncrease productivityHigh cost of labourLabor shortagesSafetyHigh cost of raw materialImprove qualityReduction of in-process inventory
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Automation type
Fixed automation Pneumatic, hydraulic
Programmable automation PLC, industrial robot
Flexible automation CIM, FMS,
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ProgrammableAutomation
FlexibleAutomation
FixedAutomation
Manual Methods
Pro
du
ct v
arie
ty
Production volume
The comparison
Low High
Complex
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Automation Level
ERP, SCM(management level)
MES(planning level)
SCADA network(supervision level)
PLC, PC, PID(control level)
Sensors, Actuators, Valves(field level)
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Automation is powered by several forms of energy such as Pneumatic, Electric
and Hydraulic
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PNEUMATIC
IntroductionThe term ‘pneuma’ is derived from theancient Greek, and meant breath or wind,and also the soul in philosophy
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Definition Pneumatic is the science of mechanical
properties of elastic fluid
In industry ‘pneumatic’ generally refers to the use of compressed air to transmit power and/or motion
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If we use pneumatic energy, we shall take the air, compact it into a case and release it with a certain amount of volume to an actuator. The actuator will
move a load.
dans la mémoire avec de l'Al Khwarizmi
We use energy to
move a Load
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This is actually what happen!!!
Air
Compressed Air
load
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Actuating devicesOutputs
Final control elementControl signal
Processing elementProcessing signals
Input elementsInput signals
Energy supplySource
Pneumatic system structure & signal flow
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Direct control of a pneumatic cylinder
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Indirect control of a pneumatic cylinder
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Single acting cylinder
Used mainly for clamping, ejecting, pressing in, lifting, feeding etc.
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Control of a single-acting cylinder
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Double acting cylinder
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Control of a double-acting cylinder
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Basic symbol referring to ISO 1219Actuators…..
DAC-single Adjustablecushioning
Single Acting
Double Acting DAC - Non-adjustable
cushioning
DAC-AdjustableCushioning both ends
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Valve symbol description
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Valves…..
5/2 way Directional Control Valve
5/3 way Directional Control Valve
4/2 way Directional control valve
3/2 way Directional Control Valve
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Cont…
Flow control valve
Check valve
Shuttle valve
Two pressure valve
One way flow control valve
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Methods of actuations
Solenoid op
Foot pedal Solenoid with pilot op
Roller opSpring return
Idle roller op
Lever op
Pressure releasePush button
Air pilotManual op
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According to ISO 1219 – pneumatic schematic circuit
PBb+
Input Elements
Processing Element
Actuating element
Energy SupplyActual Movement
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Real application
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PNEUMATIC PRACTICE 1
Logic elementsOR functionAND function
Control valvesFlow control valveOne way flow control valveCheck valve
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OR function
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AND function
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Flow control valve – throttle valve
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One-way flow control valve
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Check valve
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Task 1 Design the electro-pneumatic control circuit for
the following operations : Press switch A to extends a cylinder piston and
press switch C to retracts it. Press either switch A or B will extend a cylinder
piston. Then, it will be automatically retracted when touching a limit switch.
Press switch A will extends a cylinder piston. It will be retracted if a sensor detect it end while switch B is pressed.
*Use a 5/2 way DCV double solenoids.